chemical products, namely, persulfates and persulfate activators for use in the modification of fluids used in hydraulic fracturing for stimulation of oil and gas wells; chemical additives for oil well drilling fluids; chemical additives for fracturing fluid for use in oil and gas wells; chemical additives for reduction of viscosity of simulation fluids used in oil/gas exploration; chemical additives for stimulation and water treatment at oil and gas wells and fracturing sites, supporting inc...